Diff

util-src/windows.c @ 10921:6eb5d2bb11af

util-src: Use the luaL_pushfail API added in Lua 5.4 to highlight all failure conditions Actually just an alias of pushnil, but it does make it more obvious where the failure conditions are, which is good for readability.
author Kim Alvefur <zash@zash.se>
date Sun, 07 Jun 2020 02:25:56 +0200
parent 7889:b8d694646597
child 12575:1f6f05a98fcd
line wrap: on
line diff
--- a/util-src/windows.c	Sun Jun 07 02:14:55 2020 +0200
+++ b/util-src/windows.c	Sun Jun 07 02:25:56 2020 +0200
@@ -22,6 +22,9 @@
 #if (LUA_VERSION_NUM == 501)
 #define luaL_setfuncs(L, R, N) luaL_register(L, NULL, R)
 #endif
+#if (LUA_VERSION_NUM < 504)
+#define luaL_pushfail lua_pushnil
+#endif
 
 static int Lget_nameservers(lua_State *L) {
 	char stack_buffer[1024]; // stack allocated buffer
@@ -45,14 +48,14 @@
 
 		return 1;
 	} else {
-		lua_pushnil(L);
+		luaL_pushfail(L);
 		lua_pushfstring(L, "DnsQueryConfig returned %d", status);
 		return 2;
 	}
 }
 
 static int lerror(lua_State *L, char *string) {
-	lua_pushnil(L);
+	luaL_pushfail(L);
 	lua_pushfstring(L, "%s: %d", string, GetLastError());
 	return 2;
 }